QToolButton icon did not appear

[mismael85]

hi,
i am using QToolButton to QFileDialog::getOpenFileName so i
used the following function to set the button icon

browseButton->setIcon(QIcon(":/images/open.png"));

browseButton->setIcon(QIcon(":/images/open.png"));

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and i added the file entry in the resource file

<file>images/open.png</file>

<file>images/open.png</file>

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but, the icon did not appear
what should i do?